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| author | Avi Kivity <avi@redhat.com> | 2010-07-13 14:27:04 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-02 06:40:40 +0300 |
| commit | 32ef26a3598636be520abed90ed0c2f439d36bbe (patch) | |
| tree | bf6cff9c68d5ed9116656dfb1f40d9bc8bae7ace /arch/x86 | |
| parent | 4a994358b919c3b14de61be5e30d9edc9089ba3f (diff) | |
| download | op-kernel-dev-32ef26a3598636be520abed90ed0c2f439d36bbe.zip op-kernel-dev-32ef26a3598636be520abed90ed0c2f439d36bbe.tar.gz | |
KVM: MMU: Add link_shadow_page() helper
To simplify the process of fetching an spte, add a helper that links
a shadow page to an spte.
Reviewed-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 10 | ||||
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 7 |
2 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 89d7a2c..df3a7a7 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1482,6 +1482,16 @@ static void shadow_walk_next(struct kvm_shadow_walk_iterator *iterator) --iterator->level; } +static void link_shadow_page(u64 *sptep, struct kvm_mmu_page *sp) +{ + u64 spte; + + spte = __pa(sp->spt) + | PT_PRESENT_MASK | PT_ACCESSED_MASK + | PT_WRITABLE_MASK | PT_USER_MASK; + *sptep = spte; +} + static void kvm_mmu_page_unlink_children(struct kvm *kvm, struct kvm_mmu_page *sp) { diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 1cea41c..36dc074 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -309,7 +309,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, { unsigned access = gw->pt_access; struct kvm_mmu_page *sp; - u64 spte, *sptep = NULL; + u64 *sptep = NULL; int direct; gfn_t table_gfn; int r; @@ -395,10 +395,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, } } - spte = __pa(sp->spt) - | PT_PRESENT_MASK | PT_ACCESSED_MASK - | PT_WRITABLE_MASK | PT_USER_MASK; - *sptep = spte; + link_shadow_page(sptep, sp); } return sptep; |
